Machine for smoothing and polishing bevels



Nov. 25,1923. 1,475,742"

2. BROWN 7 MACHINE FOR SMOOTHING AND POLISHING BEVELS Filed March 18. 1922 2 Sheets-Sheet 1- Ivan/foe (3. BROWN MACHINE FOR SMOOTHING AND POLISHING BEVELS Nov. 27, 1923. I 1,415,742

Filed March is. 1922 2 Sheets-Sheet 2 1 FIE.Z.

o N INVENTOE the machine is'to firs s Patented Nam 2?, 14233 a u a my; 1 er 5 (no law ll i "'n se ltd CHRISTOPHER BEOll/"Ii, OF J PLATE GLASS CGIVTPANY,

Application filed March 1- Smoothing and Polishing ldevels U the following is a specification.

The invention relates to a machine for smoothing and polishing hotels on the edges of sheets or bloc is of material. The machine illustrated and described is employed forsmoothing and polishing the bevels on carrara glass, but the invention is applicable to a wide range of material. In the use of the machine in connection with glass the plates come to the machine with the hotels already ground roughly, and the function of inooth the hotels and then polish them. This is accomplished by two belts, one of which has an abradir surface to produce the so called 1 sinooth and the second of which has a polishing su ace and is used with rouge or other suitable polishing material to give the smoothed glass the necessary polish. The number of belts may be multiplied to suit requirements. Difierent bevels are taken care of by tilting the table Which carries the glass plate beneath the belts and by manipulatino' the presser device back of the belt which IOZCGS the belt against the bevels. One embodiment of the the invention is illustrated in the accompanying drawings, wherein:

Figure 1, is a plan view of the zine. Fig. 2 is a side elevation of the apparatus. Fig. 3 is a side elevation of the pre l and block on an enlarged scale. Q is an enlarged section through the polishing belt.

Referring to the drawings. 1 is the framework of the machine which be constructed of wood or iron, and 2 and 3 are the belts which are employed for smoothing and polishing the bevels on the sheets of glass, one of which sheets 4% is shown in position to receive the smoothing action of the belt 2 upon its bevel 5. The belt 2 r ads of leather or fabric with its inner surface coated with a suitable abrading material such as carborunduni. This beltpasses around the pulleys 6, 7, 8 and 9, the pulley 6 being mounted upon shaft 10 driven fro; the pulley 11 by the belt 12 as indicated in of which I ASSIGNGR TO PITTSBURGH JnehlNSYLT/"ANIA.

AND PGLISHING ISEVELS.

l. he pulley 8 is mounted upon the pivoted frame 13 h constitutes the polishing element co sists of an outer layer let of fabric or leather and an inner crably of felt or other material suitable for polishing glass, This belt passes around four pulleys which are duplicates of the pulleys 3, 7, 8 andfi and are similarly designated the pulles 6, 6, 7, 7, and 9, 9 being layer 15 prefmounted on the sl at 0. l6 and 17.

a whose bevel is The sheet of L to be smoothed rests u, on a framework 19 carried by the table 20 and the table 20 is provided with wheels edge of the plate two belts. The

may be carried beneath the fran'ieworli 19 which supports the plate a is secured to the table Q0 by means of the his 2 so that the frame work may be tilted to take care of plates having ciflerent degrees of beveling. V

In order to press the belts against the edge of the plate and thus secure the de sired smoothing and polishing effect, the lever and presser block 24 carried thereby are employed, the construction as far as parts are concerned being the sanie The lever 23 preferably lies parallel to the belt immediately thereabove and is fulcruined at one end to the cross frame member 25 (Fig. 3) by means of the bolt 26. This connection is relatively loose, so that the lever may move up and down as well as sideways. The presser block 24?: is secured to the lever by means of a yoke 27 which around the block and is secured to the block by nieans of the transverse bolt The yoke is provided with a pin 29 extending through a vertical perforation in the lever handle 23. The block 24- is in this way mounted for substantially universal movement and can be moved back and forth across the belt and up and down and may accommodate itself to varying degrees of bevels where the divergence is not too so that difierent bevels may be smoothed without tilting the framework 19 about its hinges 22. In those cases in which the diiference in angle of succeeding bevels is large the framework should he tilted to correspond, but for slight changes of bevel this is not necessary as the block will adjust itself. The presser block has its low-r side faced with leather and acts as a belt tightener.

. so that the beveled and is slightly curved as indicated in Fig. 3.

In operaton the sheet 4 is placed upon the framework 19 and moved back and forth under the belt 2 several times, the lever 23 being pressed down by the operator to force the belt against the bevel 5 and give the necessary smoothing action. After this smoothing action is completed the table is pushed from beneath the belt 2 and under the polishing belt 3. The manipulation of the handle and presser block as the plate is moved back and forth beneath this belt is the same asin the case of the abrading belt, the action being continued until the necessary polish has been secured. In order to promote the polishing action, a suitable polishing material is employed upon the felt such as rouge, putty powder or the like. A rapid and effective smoothing action is in this way secured, and the work of the operator reduced to a minimum.

What I claim is:

1. In combination in a bevel treating machine, a sheet or block support, an endless belt having an outer reducing surface and mounted to run transversely of the sheet carried on the support, means for driving the belt, and means for causing the belt to engage the bevel of the sheet comprising a lever back of the belt and parallel thereto and mounted to swing toward the belt, and a presser block supported by the lever and pivoted to rock on an axis transverse to the belt and to the lever and also pivoted to turn on an axis at substantially right angles to the face of the belt.

2. In combination in a bevel treating machine, a sheet or block support, an endless belt having an outer reducing surface and mounted to run transversely of the sheet carried on the support, means for driving the belt, and means for causing the belt to engage the bevel of the sheet comprising a lever back of the belt and mounted to swing in a vertical plane toward and from the belt, and a presser block mounted on the lever so as to turn on substantially a vertical axis and to rock on a horizontal axis transverse to the belt.

3. In combination in a bevel treating machine, a sheet or block support,an endless belt having an outer reducing surface and mounted to run transversely of the sheet carried on the support, means for driving the belt,-and means for causing the belt to engage the bevel of the sheet comprising a lever back of the belt and mounted to swing in a vertical plane toward and from the belt and also transversely of such plane, and a presser block mounted on the lever so as to turn on substantially a vertical axis and to rock on a horizontal axis transverse to the belt.

In testimony whereof, I have hereunto subscribed my name this'24cth day of Feb, 1922.

CHRISTOPHER BROWN. 

